1188830756021 has 2 divisors, whose sum is σ = 1188830756022. Its totient is φ = 1188830756020.

The previous prime is 1188830755961. The next prime is 1188830756039. The reversal of 1188830756021 is 1206570388811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1187905987921 + 924768100 = 1089911^2 + 30410^2 .

It is an emirp because it is prime and its reverse (1206570388811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1188830756021 - 2¹⁰ = 1188830754997 is a prime.

It is a super-2 number, since 2×1188830756021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1188830756521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594415378010 + 594415378011.

It is an arithmetic number, because the mean of its divisors is an integer number (594415378011).

Almost surely, 2^{1188830756021} is an apocalyptic number.

It is an amenable number.

1188830756021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188830756021 is an equidigital number, since it uses as much as digits as its factorization.

1188830756021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 1188830756021 in words is "one trillion, one hundred eighty-eight billion, eight hundred thirty million, seven hundred fifty-six thousand, twenty-one".